<template>
   <el-container class="home-container">
      <!-- 头部区域 -->
      <el-header>
         <div>
            <img src="../assets/heima.png" alt="">
            <span>电商后台管理系统</span>
         </div>
         <el-button type="info" @click="logOut">退出</el-button>
      </el-header>
      <!-- 页面主体区 -->
      <el-container>
         <!-- 侧边栏 -->
         <el-aside :width="isCollapse ? '64px' : '200px'">
            <div class="toggle_button" @click="toggleCollapse">|||</div>
            <!-- 侧边栏菜单区域 -->
            <el-menu background-color="#333744" text-color="#fff" active-text-color="#409eff" unique-opened
               :collapse="isCollapse" :collapse-transition="false" router :default-active="activePath">
               <!-- 一级菜单 -->
               <el-submenu :index="item.id + ''" v-for="item in menuList" :key="item.id">
                  <!-- 一级菜单的模板区 -->
                  <template slot="title">
                     <!-- 图标 -->
                     <i :class="iconsObj[item.id]"></i>
                     <!-- 文本 -->
                     <span>{{ item.authName }}</span>
                  </template>

                  <!-- 二级菜单 -->
                  <el-menu-item :index="'/' + subItem.path" v-for="subItem in item.children" :key="subItem.id"
                     @click="saveNavState('/' + subItem.path)">
                     <template slot="title">
                        <!-- 图标 -->
                        <i class="el-icon-menu"></i>
                        <!-- 文本 -->
                        <span>{{ subItem.authName }}</span>
                     </template>
                  </el-menu-item>
               </el-submenu>
            </el-menu>
         </el-aside>

         <!-- 右侧主体区域 -->
         <el-main>
            <!-- 路由占位符 -->
            <router-view></router-view>
         </el-main>
      </el-container>
   </el-container>
</template>

<script>
export default {
   name: 'Home',
   data() {
      return {
         // 左侧菜单数据
         menuList: [],
         iconsObj: {
            '125': 'iconfont icon-user',
            '103': 'iconfont icon-tijikongjian',
            '101': 'iconfont icon-shangpin',
            '102': 'iconfont icon-danju',
            '145': 'iconfont icon-baobiao',
         },
         // 是否折叠
         isCollapse: false,
         // 被激活的链接地址
         activePath: ''
      }
   },
   methods: {
      logOut() {
         window.sessionStorage.clear()
         this.$router.push('/login')
      },
      // 获取所有的菜单
      async getMenuList() {
         const { data: res } = await this.$http.get('menus')
         if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
         this.menuList = res.data
         console.log(res);
      },
      // 点击按钮，控制菜单的折叠与展开
      toggleCollapse() {
         this.isCollapse = !this.isCollapse
      },
      // 保持连接的激活状态
      saveNavState(activePath) {
         window.sessionStorage.setItem('activePath', activePath)
         this.activePath = activePath
      }

   },
   created() {
      this.getMenuList()
      this.activePath = window.sessionStorage.getItem('activePath')
      // console.log(this);
   }

}
</script>

<style lang="less" scoped>
.home-container {
   height: 100%;
}

.el-header {
   background-color: #373d41;
   display: flex;
   justify-content: space-between;
   padding-left: 0;
   align-items: center;
   color: #fff;
   font-size: 20px;

   >div {
      display: flex;
      align-items: center;

      span {
         margin-left: 15px;
      }
   }
}

.el-aside {
   background-color: #333744;

   .el-menu {
      border-right: none;
   }
}

.el-main {
   background-color: #eaedf1;
}

.iconfont {
   margin-right: 10px;
}

.toggle_button {
   background-color: #4a5064;
   font-size: 10px;
   line-height: 24px;
   color: #fff;
   text-align: center;
   letter-spacing: 0.2em;
   cursor: pointer;
}
</style>